28653487 has 4 divisors (see below), whose sum is σ = 28730680. Its totient is φ = 28576296.

The previous prime is 28653473. The next prime is 28653491. The reversal of 28653487 is 78435682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28653487 - 2¹¹ = 28651439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28653497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38037 + ... + 38782.

It is an arithmetic number, because the mean of its divisors is an integer number (7182670).

Almost surely, 2^28653487 is an apocalyptic number.

28653487 is a deficient number, since it is larger than the sum of its proper divisors (77193).

28653487 is an equidigital number, since it uses as much as digits as its factorization.

28653487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77192.

The product of its digits is 322560, while the sum is 43.

The square root of 28653487 is about 5352.8951979279. The cubic root of 28653487 is about 306.0031006279.

The spelling of 28653487 in words is "twenty-eight million, six hundred fifty-three thousand, four hundred eighty-seven".